GLM-5.3-Flash vs GPT-5.4
Wins 3 of 8 areas
Coding · Agents · Images and charts
Wins 5 of 8 areas
Reasoning · Facts · Math · Long documents · Following instructions
GPT-5.4 is the stronger all-rounder.GLM-5.3-Flash is cheaper and better at coding.
Scores updated · 38 tests both models report · How we compare
Where each one wins
Tests won in each of the eight areas we test. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- ReasoningHard problems that need careful thinking04GPT-5.44 of 5 tests · 1 tie
- MathCompetition and research-level math03GPT-5.43 of 3 tests
- FactsGetting facts right instead of making them up12GPT-5.42 of 3 tests
- Long documentsFinding answers in very long texts01GPT-5.41 of 1 test
- Following instructionsDoing exactly what it is asked01GPT-5.41 of 1 test
- CodingWriting and fixing software41GLM-5.3-Flash4 of 5 tests
- AgentsCarrying out multi-step tasks on its own32GLM-5.3-Flash3 of 5 tests
- Images and chartsUnderstanding pictures, charts and video10GLM-5.3-Flash1 of 2 tests · 1 tie
Long documents and following instructions rest on a single test each.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
GLM-5.3-Flash costs 96% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where GPT-5.4 pulls ahead
- Completes tasks by operating a computer desktopOSWorld-Verified+60.2points ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+31.9points ahead
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+23.4points ahead
Where GLM-5.3-Flash pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+64.1points ahead
- Real work tasks from 44 professionsGDPVal+19.9points ahead
- Finds the root cause of IT system incidentsAA IT-Bench SRE+16.7points ahead
Every test, side by side
All 38 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGLM-5.3-Flash
- LMArena · WebDevGLM-5.3-Flash by 147 rating points16091462+147 rating
- Terminal-Bench 2.1GLM-5.3-Flash by 684.378.3+6
- SciCodeGPT-5.4 by 551.656.6+5
- LiveBench · Agentic CodingGLM-5.3-Flash by 356.853.8+3
- LiveBench · CodingGLM-5.3-Flash by 1.57977.5+1.5
AgentsGLM-5.3-Flash
- OSWorld-VerifiedGPT-5.4 by 60.214.875+60.2
- GDPValGLM-5.3-Flash by 19.957.237.3+19.9
- AA IT-Bench SREGLM-5.3-Flash by 16.751.234.5+16.7
- τ-Bench V3 · BankingGLM-5.3-Flash by 7.647.239.6+7.6
- BrowseCompGPT-5.4 by 6.77682.7+6.7
ReasoningGPT-5.4
- LiveBench · ReasoningGPT-5.4 by 10.577.688.1+10.5
- CritPtGPT-5.4 by 815.423.4+8
- ARC-AGI-2GPT-5.4 by 7.565.873.3+7.5
- Humanity's Last ExamGPT-5.4 by 3.839.943.7+3.8
- GPQA Diamondtie91.292tie
FactsGPT-5.4
- AA-Omniscience · Non-hallucinationGLM-5.3-Flash by 64.172.48.3+64.1
- AA-Omniscience · AccuracyGPT-5.4 by 23.427.550.9+23.4
- SimpleQA VerifiedGPT-5.4 by 13.13245.1+13.1
Images and chartsGLM-5.3-Flash
- CharXiv (RQ)GLM-5.3-Flash by 6.689.482.8+6.6
- LMArena · Visiontie12951301tie
MathGPT-5.4
- FrontierMath Tier 4GPT-5.4 by 31.917.149+31.9
- FrontierMath Tiers 1-3 (v2)GPT-5.4 by 22.855.878.6+22.8
- LiveBench · MathematicsGPT-5.4 by 1381.294.2+13
Following instructionsGPT-5.4
- LiveBench · Instruction FollowingGPT-5.4 by 17.452.870.2+17.4
Other results13 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- ToolathlonGLM-5.3-Flash by 23.878.454.6+23.8
- NL2RepoGLM-5.3-Flash by 1556.341.3+15
- DeepSWE 1.1GLM-5.3-Flash by 11.463.452+11.4
- OfficeQA ProGLM-5.3-Flash by 11.362.451.1+11.3
- AA Agentic IndexGLM-5.3-Flash by 751.244.2+7
- DeepSearchQA (F1)GLM-5.3-Flash by 5.784.378.6+5.7
- livebench_languageGPT-5.4 by 5.377.382.6+5.3
- BabyVisionGLM-5.3-Flash by 3.753.449.7+3.7
- livebench_data_analysisGPT-5.4 by 2.976.479.3+2.9
- AA IntelligenceGLM-5.3-Flash by 2.841.839+2.8
- ARC-AGI-1GPT-5.4 by 2.79193.7+2.7
- AA-OmniscienceGLM-5.3-Flash by 1.77.55.8+1.7
- Artificial Analysis Coding Indextie71.571.1tie
Questions people ask
Which is better, GLM-5.3-Flash or GPT-5.4?
GPT-5.4 wins five of the eight areas we test: reasoning, facts, math, long documents and following instructions. GLM-5.3-Flash wins coding, agents and images and charts, and costs 96% less.
Which is better for coding?
GLM-5.3-Flash. It wins 4 of the 5 coding tests both models report; GPT-5.4 wins 1.
Which is cheaper?
GLM-5.3-Flash costs $0.15 per million input tokens and $0.50 per million output tokens; GPT-5.4 costs $2.50 and $15.00. That makes GLM-5.3-Flash about 96% cheaper for the same work.
How do you compare the two?
We use the 38 benchmark tests both models have published scores on. The verdict counts the 25 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 13 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.